He kila kila austenitic kiʻekiʻe kalapona haʻahaʻa ʻaʻole i hoʻopaʻa ʻia ka 904L. ʻO ka hoʻohui ʻana o ke keleawe i kēia papa e hāʻawi iā ia i ka pale ʻana i nā waikawa hoʻemi ikaika, ʻoiai ka waikawa sulfuric. He kūpaʻa loa hoʻi ia i ka hoʻouka kaua chloride - ʻo ka pitting / crevice corrosion a me ka stress corrosion cracking.
ʻAʻohe magnetic kēia papa i nā kūlana āpau a he weldability a me formability maikaʻi loa. Hāʻawi pū ka ʻano austenitic i kēia papa i ka paʻakikī maikaʻi loa, a hiki i nā mahana cryogenic.
Loaʻa i ka 904L nā mea nui o ka nickel a me ka molybdenum. Hiki ke hoʻokō ʻia nā noi he nui i hana maikaʻi ʻia ai kēia papa ma ke kumu kūʻai haʻahaʻa e ke kila kila duplex 2205 (S31803 a i ʻole S32205), no laila ʻaʻole i hoʻohana pinepine ʻia e like me ka wā ma mua.
Nā Waiwai Koʻikoʻi
Ua kuhikuhi ʻia kēia mau waiwai no ka huahana ʻōwili pālahalaha (pā, pepa a me ka ʻōwili) ma ASTM B625. Ua kuhikuhi ʻia nā waiwai like akā ʻaʻole pono like no nā huahana ʻē aʻe e like me ka paipu, ka ʻōmole a me ke kaola i kā lākou mau kikoʻī.
Hoʻonohonoho ʻana
Papa 1.Nā pae haku mele no nā kila kila kila 904L.
| Papa | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | minuke ka nui loa | - 0.020 | - 2.00 | - 1.00 | - 0.045 | - 0.035 | 19.0 23.0 | 4.0 5.0 | 23.0 28.0 | 1.0 2.0 |
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Nā Waiwai Mekanika
Papa 2.Nā ʻano hana mechanical o nā kila kila kila papa 904L.
| Papa | Ikaika Tensile (MPa) min | Ikaika Hua 0.2% Hōʻoia (MPa) min | Elongation (% i loko o 50mm) min | Paʻakikī | |
| Rockwell B (HR B) | ʻO Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 maʻamau | - |
| ʻO ka pae waiwai paʻakikī ʻo Rockwell he mea maʻamau wale nō; ʻo nā waiwai ʻē aʻe he mau palena i kuhikuhi ʻia. | |||||
Nā Waiwai Kino
Papa 3.Nā ʻano kino maʻamau no nā kila kila kila 904L.
| Papa | Ka nui o ka paʻa | Modulus Elastic | ʻO ke koina awelika o ka hoʻonui wela (µm/m/°C) | Ka Hoʻokele Wela | Wela Kūikawā 0-100°C | Ke kū'ē ʻana o ka uila | |||
| 0-100°C | 0-315°C | 0-538°C | Ma 20°C | Ma 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Hoʻohālikelike kikoʻī papa
Papa 4.Nā kikoʻī papa no nā kila kila kila papa 904L.
| Papa | UNS No | Pelekane Kahiko | ʻEuronorma | SS Kuekene | JIS Kepanī | ||
| BS | En | No | Inoa | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| He hoʻohālikelike wale nō kēia mau hoʻohālikelike. Ua manaʻo ʻia ka papa inoa he hoʻohālikelike o nā mea like me ka hanaʻaʻolema ke ʻano he papa kuhikuhi o nā mea like i ʻaelike ʻia. Inā pono nā mea like pololei, pono e nānā i nā kikoʻī kumu. | |||||||
Nā Papa ʻē aʻe hiki ke hana
Papa 5.Hiki ke loaʻa nā ʻano hana ʻē aʻe i ke kila kila 904L.
| Papa | No ke aha e koho ʻia ai ma kahi o 904L |
| 316L | He koho haʻahaʻa ke kumukūʻai, akā me ke kūpaʻa haʻahaʻa loa i ka pala. |
| 6Mo | Pono ke kūpaʻa kiʻekiʻe aʻe i ka palaho ʻana o ka lua a me ka crevice. |
| 2205 | He ʻano like loa ke kūpaʻa ʻana i ka pala, me ka 2205 i ʻoi aku ka ikaika mechanical, a ma ke kumukūʻai haʻahaʻa i 904L. (ʻAʻole kūpono ka 2205 no nā mahana ma luna o 300°C.) |
| Super duplex | Pono ke kūpaʻa kiʻekiʻe aʻe i ka pala, me ka ikaika ʻoi aku ka kiʻekiʻe ma mua o 904L. |
Ke kū'ē ʻana i ka palaho
ʻOiai ua hoʻomohala mua ʻia no kona kūpaʻa ʻana i ka waikawa sulfuric, he kūpaʻa kiʻekiʻe loa ia i nā ʻano kaiapuni like ʻole. ʻO ka PRE o 35 e hōʻike ana he kūpaʻa maikaʻi ka mea i ka wai kai mahana a me nā kaiapuni chloride kiʻekiʻe ʻē aʻe. ʻO ka nui o ka nickel e hopena i kahi kūpaʻa maikaʻi loa i ka haki ʻana o ka corrosion stress ma mua o nā māka austenitic maʻamau. Hoʻohui ke keleawe i ke kūpaʻa i ka sulfuric a me nā waikawa hoʻemi ʻē aʻe, ʻoi aku hoʻi i ka pae "mid concentration" ikaika loa.
I ka hapa nui o nā ʻano, loaʻa iā 904L kahi hana corrosion waena ma waena o ka papa austenitic maʻamau 316L a me ka 6% molybdenum i hoʻohuihui nui ʻia a me nā papa "super austenitic" like.
I loko o ka waikawa nitric aggressive, ʻoi aku ka liʻiliʻi o ke kūpaʻa o 904L ma mua o nā papa molybdenum-free e like me 304L a me 310L.
No ke kūpaʻa kiʻekiʻe loa i ka nahā ʻana i ka palaho ma nā wahi koʻikoʻi, pono e mālama ʻia ke kila me ka hoʻonā ma hope o ka hana anu.
Ke kū'ē wela
Maikaʻi ke kūpaʻa ʻana i ka oxidation, akā e like me nā papa alloyed kiʻekiʻe ʻē aʻe, ʻeha ia i ka paʻa ʻole o ke kūkulu ʻana (ka ua ʻana o nā ʻāpana brittle e like me sigma) ma nā mahana kiʻekiʻe. ʻAʻole pono e hoʻohana ʻia ka 904L ma luna o 400°C.
Ka Lapaʻau Wela
Lapaʻau Hoʻonā (Annealing) - hoʻomehana i 1090-1175°C a hoʻomaʻalili koke. ʻAʻole hiki ke hoʻopaʻakikī ʻia kēia papa e ka lapaʻau wela.
Kuʻihao
Hiki ke hoʻopili pono ʻia ʻo 904L e nā ʻano hana maʻamau āpau. Pono e akahele no ka mea paʻa loa kēia papa i ka austenitic, no laila hiki ke nahā wela, ʻoiai i nā hoʻopili i kaupalena ʻia. ʻAʻole pono e hoʻohana ʻia ka hoʻomehana mua a i ka hapa nui o nā hihia ʻaʻole pono ka mālama wela ma hope o ka hoʻopili ʻana. Hoʻomaʻamaʻa mua ʻo AS 1554.6 i nā koʻokoʻo a me nā electrodes Papa 904L no ka hoʻopili ʻana o 904L.
Hana ʻana
He kiʻekiʻe ka maʻemaʻe o 904L, haʻahaʻa ka sulfur, a no laila, ʻaʻole ia e mīkini maikaʻi. ʻOiai me kēia, hiki ke mīkini ʻia ka papa me ka hoʻohana ʻana i nā ʻano hana maʻamau.
Hoʻokō maʻalahi ʻia ke kulou ʻana i kahi radius liʻiliʻi. I ka hapanui o nā hihia, hana ʻia kēia i ke anu. ʻAʻole koi ʻia ka annealing ma hope, ʻoiai pono e noʻonoʻo ʻia inā e hoʻohana ʻia ka hana ʻana i kahi ʻano kahi i manaʻo ʻia ai nā kūlana haki corrosion stress koʻikoʻi.
Nā noi
ʻO nā noi maʻamau e komo pū me:
• Hale hana no nā waikawa sulfuric, phosphoric a me acetic
• Ka hana ʻana i ka pulp a me ka pepa
• Nā ʻāpana i loko o nā hale hana holoi kinoea
• Nā lako hoʻoluʻu wai kai
• Nā ʻāpana hana hoʻomaʻemaʻe ʻaila
• Nā uea i loko o nā mea hoʻoheheʻe electrostatic
